53edo: Difference between revisions

In the opinion of some^{at least [[User:Godtone]]}, 53edo is the first equal division to deal adequately with the [[13-limit]], due to finding the [[LCJI]] [[interseptimal interval]]s [[15/13]] and [[13/10]] distinctly from adjacent [[7-limit|septimal]] intervals [[8/7]] and [[7/6]], and [[9/7]] and [[21/16]], respectively, while avoiding equating [[11/9]] with [[16/13]], so that the former is tuned very flat to equate it with (a slightly flat) [[~]][[39/32]], corresponding to it supporting [[amity]]. Another reason for this view is it not only keeps the [[9-odd-limit]] distinctly consistent and accurate but up to tempering out ([[15/14]])/([[16/15]]) = [[225/224|S15]] and ([[13/12]])/([[14/13]]) = [[169/168|S13]] it keeps the no-11's [[15-odd-limit]] distinctly consistent too (and still quite accurate), and the same is almost true for the full 15-odd-limit up to tempering out ([[11/10]])/([[12/11]]) = [[121/120|S11]]; it is extremely close to having the entire 15-odd-limit consistent, with the only inconsistency caused by the compounding errors of the flat 11 and sharp 7 so that [[14/11]] is mapped inconsistently sharp and equated with [[9/7]], but it has the benefit of doing very well in larger prime/subgroup-limited odd-limits. Therefore it comes as a bonus that 53edo is notable as an excellent [[5-limit]] system, a fact apparently first noted by {{w|Isaac Newton}}<ref>[https://emusicology.org/index.php/EMR/article/view/7647/6030 Muzzulini, Daniel. 2021. "Isaac Newton's Microtonal Approach to Just Intonation". ''Empirical Musicology Review'' 15 (3-4):223-48. https://doi.org/10.18061/emr.v15i3-4.7647.]</ref>, notably tempering out [[Mercator's comma]] (3⁵³/2⁸⁴), the [[schisma|schisma (32805/32768)]], [[15625/15552|kleisma (15625/15552)]], and [[amity comma|amity comma (1600000/1594323)]]. In the 7-limit it tempers out the [[225/224|marvel comma (225/224)]], [[1728/1715|orwellisma (1728/1715)]], [[3125/3087|gariboh comma (3125/3087)]], and [[4375/4374|ragisma (4375/4374)]]. In the 11-limit, it tempers out [[99/98]] and [[121/120]] (in addition to their difference, [[540/539]]), and is the [[optimal patent val]] for [[big brother]] temperament, which tempers out both, as well as 11-limit [[orwell]] temperament, which also tempers out the 11-limit commas [[176/175]] and [[385/384]]. In the 13-limit, it tempers out [[169/168]], [[275/273]], [[325/324]], [[625/624]], [[676/675]], [[1001/1000]], [[2080/2079]], and [[4096/4095]], and gives the optimal patent val for [[Marvel family #Athene|athene]] temperament. It is the seventh [[The Riemann zeta function and tuning #Zeta EDO lists|strict zeta edo]]. It can also be treated as a no-elevens, no-seventeens tuning, on which it is [[consistent]] all the way up to the 23-odd-limit.